At one time Pinus sylvestris was the number one most common species used as a Christmas tree. That dense pyramidal “Christmas tree” form of a young plant is probably the most familiar form. There is though, variation in habit.
Howard F. Schwartz, Colorado State University, Bugwood.org
Pinaceae, tree, conifer, cone, needle, evergreen, Pinus sylvestris, Scots pine, Scotch pine